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[DhtmlXQ] [DhtmlXQ_init]500,350[/DhtmlXQ_init] [DhtmlXQ_binit]9999999939379999999913999999992499999999319999999999991948999999[/DhtmlXQ_binit] [DhtmlXQ_pver]130606[/DhtmlXQ_pver] [DhtmlXQ_title]趣味学残局之炮兵的运用[/DhtmlXQ_title] [DhtmlXQ_movelist]13233132232232312220313224233231232231302221190921313031208009198089313089193031191531321535323137483132393832313837314135054142050942410949415137475150485750514948515048495051494851524858[/DhtmlXQ_movelist] [DhtmlXQ_move_0_5_1]242331302220303123223130222119092131303120803130808909198919303119133130133330403748404133534142393842415359415159395150394950513837515037475051495951504857[/DhtmlXQ_move_0_5_1] [DhtmlXQ_move_0_3_2]232132312120313024233031232231302221190921313031207009197079190979093132090632310636313037483031393831323837324236164241161941421949425237475251485751524959[/DhtmlXQ_move_0_3_2] [DhtmlXQ_move_2_5_3]2423313023223031212031302221190921313031206009196069313069193031191331321333324237484241338341428389425239385242383742418949415137475150495950514857[/DhtmlXQ_move_2_5_3] [DhtmlXQ_move_3_7_4]21203031232231302221190921313031207031307079303179093130090530310535314137484140393840303837304035254041252941422949425237475251495951524857[/DhtmlXQ_move_3_7_4] [DhtmlXQ_move_0_2_5]3130232130312120313024233031232231302221190921313031208031328089091989193231191631321636323137483141393841313837314136064142060942410949415137475150485750514948515048495051494851524858[/DhtmlXQ_move_0_2_5] [DhtmlXQ_move_5_5_6]2423313023223031212031302221190921313031207009197079192979293130292330312333314137484140338340418389415189495152393852513837515237475251495951504857[/DhtmlXQ_move_5_5_6] [DhtmlXQ_comment1]平炮防卒是必然[/DhtmlXQ_comment1][DhtmlXQ_comment3]注意此时炮七进一,而不是炮七进二或进三,这是有意图的[/DhtmlXQ_comment3][DhtmlXQ_comment2_3]此种情况走炮七进二也是有意图的[/DhtmlXQ_comment2_3][DhtmlXQ_comment2_15]通过献卒,再平炮打死卒,红方形成必胜[/DhtmlXQ_comment2_15] [/DhtmlXQ]

此局看起来简单,但其中有一点需要特别强调:如下图

趣味学残局之炮兵的运用

假如红方进炮不到位形成如下局面,红方就不可胜,而且会输棋,为什么呢?

很显然,如果上图中轮到红方走,红方只能走炮,则卒2平3胜,如果轮到黑方走,只能走卒2平1,则兵七平六,将4进1,炮七平一,如此红方胜利,也就是:谁先走谁负

那么我们在前期计算时,就需要将这个结果考虑进去,采用一步分成两步的方法,交出先手。